Five years after the first cases of COVID-19, reports of hMPV, an obscure respiratory virus in China may understandably raise concerns.

The human metapneumovirus is reportedly surging in China, but should Americans be concerned? Here's what to know about HMPV symptoms and more.

Authorities in China said they are monitoring cases of human metapneumovirus, or HMPV, after a reported increase inside the country, according to Reuters. Although cases are increasing at a rapid rate,

While cases are climbing in China, the situation is very different from what it was when Covid-19 emerged five years ago, medical experts say. HMPV has circulated in humans for decades.

In China, reports of HMPV infections have indeed been rising in recent weeks in the more northerly regions. But so have reports of all the other respiratory pathogens including seasonal flu, rhinovirus and RSV.

Plenty of viruses are having their strongest season for years. But experts have urged calm about HMPV, which is not a new disease — even if you've never heard about it.

Cases of human metapneumovirus, or HMPV, a contagious virus that can lead to respiratory disease, is reportedly spiking in northern China. Infectious disease experts say risk to the U.S. is low.